Mori, Yuichi
Ishii, Keiko
Article History
First Online: 4 August 2018
Compliance with Ethical Standards
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. Informed consent was obtained from all individual participants included in the study.
: Yuichi Mori declares that he has no conflict of interest. Keiko Ishii declares that she has no conflict of interest.